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Juneau, AK Local Forecast Office

4NM ESE Grindall Island AK

Marine Point Forecast

[NOTICE]

Today
High: 51 °F
NW 10kt
1-2ft
Tonight
Low: 44 °F
Light Wind
1ft
Saturday
High: 53 °F
WNW 10kt
1-2ft
Saturday Night
Low: 45 °F
SW 15kt
1-2ft
Sunday
High: 51 °F
⇑SSE 25kt
5ft
Sunday Night
Low: 46 °F
SE 25kt
5-6ft
Monday
High: 50 °F
SSE 25kt⇓
4-5ft
Monday Night
Low: 45 °F
W 10kt
2ft
Tuesday
High: 51 °F
Light Wind
1ft

High and low forecast temperature values represent air temperature.

Water temperature forecast is experimental.

Associated Zone Forecast which includes this point

Last Update: 3:39 pm AKDT May 14, 2026
Forecast Valid: 8am AKDT May 15, 2026-6pm AKDT May 21, 2026

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Detailed Forecast

Synopsis: Light winds continue across the area as a ridge moves into the gulf Friday. There continues to be a chance of periods of slightly gusty winds around 15 kts as showers move over the area. A developing gale force system moves into the Gulf late Saturday into Sunday.

Today

WNW wind 5 to 10 kt becoming SSE in the afternoon. A chance of showers, mainly before 4pm. Seas 1 to 2 ft.

Tonight

Variable winds 5 kt or less. A slight chance of showers before 10pm. Seas around 1 ft.

Saturday

WNW wind around 10 kt becoming SW in the afternoon. Mostly sunny. Seas 1 to 2 ft.

Saturday Night

SW wind 5 to 15 kt becoming SSE after midnight. Mostly clear. Seas 1 to 2 ft.

Sunday

SSE wind 10 to 15 kt increasing to 20 to 25 kt in the afternoon. Rain likely, mainly after 4pm. Seas 2 ft building to 5 ft.

Sunday Night

SE wind around 25 kt, with gusts as high as 30 kt. Rain. Seas 5 to 6 ft.

Monday

SSE wind 20 to 25 kt decreasing to 15 to 20 kt in the morning. Winds could gust as high as 30 kt. Showers, mainly before 4pm. Seas 4 to 5 ft.

Monday Night

W wind around 10 kt. A chance of showers. Seas around 2 ft.

Tuesday

Variable winds 5 kt or less. A chance of showers. Seas around 1 ft.

*Notices:

This forecast is for a single location. For safety concerns, mariners should be aware of the weather over a larger area. Forecast information for a larger area can be found within the zone forecast and the NDFD graphics.
The forecast conditions at a particular point may not exceed the criteria of a Small Craft Advisory, Gale, Storm etc. These watches/warnings/advisories are issued for the entire zone in which the point resides and mariners should act accordingly.